Liner for jars



'Dec. 17, 1929. F R 1,739,530

LINER FOR JARS Filed May 26, 1926 Patented Dec. 17, 1929 UNITED STATES PATENT, OFFICE THOMAS L. TALIAFERB'O, OF CHICAGO, ILLINOIS, ASSIGNOR T PHOENIX-HERMETIC COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW YORK V LINER FOR JARS Application filed May 26, 1926. Serial No. 111,815.

The invention relates to new and useful improvements in liners for jars.

An object of the invention is to provide a liner for jars consisting of a pulp board back,

a thin facing'disk and a layer of paraflin or wax which is non-adhesive, wherein the disk is secured to the pulp board by indenting the edge of the disk at closely spaced intervals so that portions of said disk are embedded in the paraflin or wax and the parafiin or wax thereby embedded in the pulp board.

In the drawings Figure 1 is a bottom plan View of a liner embodying the improvements;

Fig. 2 is a view on an enlarged scale partly in perspective and partly in section showing a portion of the under face of the liner;

Fig. 3 is a view partly in section showing the devices for cutting the liner and indenting the edge thereof, and

Fig. & is a perspective View on an enlarged scale of a portion of the liner, the liner being positioned with the protecting disk on the under side thereof, as in use.

The improved liner consists of a layer of pulp board and a layer of thin facing material which may be a wax paper, a paraffin paper, or some other equivalent material, and a layer of parafiin or wax which is not adhesive. A layer of hot wax or paraflin is placed on the pulp board. A layer of hot paraffin or wax is placed on one or both faces of the facing material. Then the two waxed faces are placed together, while the wax is warm, and the parts are pressed, so that the facing material will, in a measure, be held on the pulp board through the slight adhesion which is present in the paraiiin or wax. This is sufficient to hold the layers together while handling; and liners can be cut therefrom wherein the facing material will be held to the pulp board during usual handling. The present invention is directed to a liner of the above type, wherein the facing material is firmly secured to the pulp board by indenting the marginal portions of the facing material and thus embedding the same in the wax layer and also into the pulp board.

Referring to the drawings, the pulp board is shown at A. This pulp board is coated with a hot paraffin or wax which is non-adhesive as indicated at B. The facing material indicated at O is preferably paraffin paper, wax paper, or possibly plainpaper, or any other thin material. This facing material C is likewise coated with hot paraffin. The paper facing is superposed on the pulp board and while the wax is warm, the layers are passed between rollers. This will cause the facing material to adhere to the pulp board to a certain extent. The sheets of the material thus formed are submitted to a cut ting die for cnttingout circular disks which are to be used for jar liners. As shown in big. 3, this cutting die consists of a female member 1 and a male member 2. The cutting edge 3 of the male member cooperates with the cutting edge 4 of the female member. The female member is provided with a vertical wall 5 directly beneath the cutting edge 4. This wall is of such proportions relative to the disks which are cut, that when the disks are cut one after another and crowded into the female member, the friction of the wall on the edge of the disk will cause the disk thus cut to take a convex form, with the curved portion extending downwardly. The sheets of material from which the disks are out are placed in the-cutting die with the material forming the face thereof on the under side of the disk. This vertical wall 5 holds the disk convexed, and a series of disks, one after the other, will follow along the wall.

In the lower part of the female member is a knurling device 6 which is so set in the female member as to provide projecting ribs radially of the female member so that when the disk engages this knurling device, the

These projecting ribs extend inwardly.

edges of the disk will be indented by the ribs 7. The ribs 7 start at nothing, so to speak,

and increase to a maximum in height at a point indicated by the line 8.

As the disk passes along the knurling device, the edge of the disk will be milled or indented at spaced intervals, and these indentations on the face of the protecting material are V-shaped, with the vertex of the V back from the peripheral edge of the disk,

. ripheral edge.

' cated at 9 in Fig. 2 of the drawing.

and the widest portion of the V at the pe- The protecting material is forced down into the layer of wax as indi- The facing material and the wax are further embedded in thepulpboard as indicated at 10 in Fig. 20f the drawing. At theperipheral: edge of the disk, the indentation is likewise V-shaped, with the vertex of the V indicated'at 11 at the lower side as viewed in Fig 2, and, at the upper-sideof the liner as viewed in Fig. 4. The indentation in the periphery has the wide end of the V portion terminating at the Wide end of the V'indenta-. tion in the facing material of the liner. In fact, this-indentation runs diagonally from theinnerend 12 of theV-shapedportion in the facing-material totheinner endll of the V-shaped portion in the peripheryof-the iner; The shaping-of this indentation is not material, except-that it should be such that theprotecting material on the face of the pulp board isnotcut-through, but is'emedded in the Wax layer and in the pulp board --soas-to aidin the securing of the protecting material to the pulp board.

It is desirablevthat this indentation should not'extend through tothe opposite face of the pulp board to any extent, so that the pulp board-will be unbroken throughout the entireg outer face thereof; The convexing of theiliner during. cutting, and the indenting of the edge; while the liner is still in convexed condition," enables'the se' indentations :to be .placedin-the finished liner after the manner just stated. These indentations cause the wax to so grip theprotecting material that although the waxis non-adhesive still it will hold the facing material to the pulp-board and-the-finished liner may be shipped-or. hansubstantial-thickness, and the protecting facing material with. the indentations as .described above for the purpose stated. 7 It is obviousnthat minor: changesin the; de

tails of construction may be made Without deters- Patent, is' a pulp board, a disk -0f= protecting material coveringsaid pulp board, a layer of adhesive 1 Wax of substantial thickness between the pulp board and the disk," said disk being. indented without rupturing-the same at the periph: eral edges thereof so that the indented por tions of the disk are indented in the layenof-Wax'and the disk, togetherwiththe wa'-x, indented in the-body portionof the'pulp'.

l. Aliner for jars co1nprising- -a layer of" board, but leaving the face of the pulp board tions of thedisk" are indented 'ini the"layer" of wax and thed'i'sk, togethef'withthe wax, indented in the body portion of the pulp board, but leaving the face of the pulp board opposite the disk unbroken, said indentations extending back from the peripheral edge of the disk of protecting :m'aterial a-nd tern'iinating substantially-atthe peripheral edge ofthe pulp boardat the-other side-from -the disk:

lil -testimony whereof,-I aflix signature.

THOMAS L; .TALIAFERRO. 

